
// ==UserScript==
// @name          GM_config_zh-CN
// @author        Mike Medley & zxf10608
// @version       1.3.7
// @description   GM_config_中文版
// @grant         GM_getValue
// @grant         GM_setValue
// @grant         GM_deleteValue
// @exclude       *
// @license       LGPL 3
// ==/UserScript==

/*
  优化说明
    1、改成中文 "确定"、"取消" 按钮。
    2、select 新增了 textContents 数组。
	3、新增了skin: 'tab'换页切换菜单样式
	4、更新部分翻译
	5、优化字体显示效果
	6、优化同一行内CSS样式
*/


// The GM_config constructor
function GM_configStruct() {
  // call init() if settings were passed to constructor
  if (arguments.length) {
    GM_configInit(this, arguments);
    this.onInit();
  }
}

// This is the initializer function
function GM_configInit(config, args) {
    // Initialize instance variables
    if (typeof config.fields == "undefined") {
        config.fields = {};
        config.onInit = config.onInit || function() {};
        config.onOpen = config.onOpen || function() {};
        config.onSave = config.onSave || function() {};
        config.onClose = config.onClose || function() {};
        config.onReset = config.onReset || function() {};
        config.isOpen = false;
        config.title = '用户脚本设置';
        config.css = {
            basic: [
                "#GM_config * { font-family: arial,tahoma,myriad pro,sans-serif; }",
                "#GM_config { background: #FFF; }",
                "#GM_config input[type='radio'] { margin-right: 8px; }",
                "#GM_config .indent40 { margin-left: 40%; }",
                "#GM_config .field_label { font-size: 14px; font-weight: bold; margin-right: 6px; }",
                "#GM_config .radio_label { font-size: 14px; }",
                "#GM_config .block { display: block; }",
                "#GM_config .saveclose_buttons { margin: 16px 10px 10px; padding: 2px 12px; }",
                "#GM_config .reset, #GM_config .reset a," +
                  " #GM_config_buttons_holder { color: #000; text-align: right; }",
                "#GM_config .config_header { font-size: 20pt; margin: 0; }",
                "#GM_config .config_desc, #GM_config .section_desc, #GM_config .reset { font-size: 9pt; }",
                "#GM_config .center { text-align: center; }",
                "#GM_config .section_header_holder { margin-top: 8px; }",
                "#GM_config .config_var { margin: 0 0 4px; }",
                "#GM_config .section_header { background: #414141; border: 1px solid #000; color: #FFF;" +
                  " font-size: 12pt; margin: 0; }",
                "#GM_config .section_desc { background: #EFEFEF; border: 1px solid #CCC; color: #575757;" +
                  " font-size: 10pt; margin: 0 0 6px; }",
                // newer
                "#GM_config input[type='number'] { width: 60px; }",
                "#GM_config .nav-tabs { margin: 10 0}",
                "#GM_config .nav-tabs > div { display: inline; padding: 3px 10px; }",
                "#pv-prefs .section_header_holder { padding-left: 10px; }",
                ].join('\n') + '\n',
            skin_tab: [
                "#GM_config { background: #EEE; }",
                "#GM_config textarea { width: 98%; height: 45px; margin-top: 5px; }",
                "#GM_config .field_label { display: inline-block; font-weight: normal; }",
                // 在同一行内的设置
                "#GM_config .inline input[type='checkbox'] {margin: 3px 3px 3px 0px;}",
                "#GM_config .inline .config_var { margin-left: 15px; }",
                // 内容样式
                "#GM_config .config_var { font-size: 14px; padding: 5px; margin: 0; }",
                "#GM_config .config_header a { text-decoration: none; color: #000; }",
                "#GM_config .nav-tabs { margin: 20 0}",
                "#GM_config .nav-tabs > div { font-size: 15px; color: #999; cursor: pointer; padding: 10px 20px; }",
                "#GM_config .nav-tabs > .active { cursor: default; color: #FFF; }",
                "#GM_config .nav-tabs > div:hover { color: #FFF; }",
                ].join('\n') + '\n',
            skin_1: [  // 仿 Mouseover Popup Image Viewer 样式
                "#GM_config { background: #EEE; }",
                "#GM_config textarea { width: 98%; height: 45px; margin-top: 5px; }",
                "#GM_config .config_var { font-size: 12px; }",
                "#GM_config .inline .config_var { margin-left: 15px; }",
                "#GM_config .field_label { display: inline-block; font-weight: normal; }",
                "#GM_config { padding: 20px 30px; margin: 0; }",
                "#GM_config .config_header { margin-bottom: 10px; }",
                "#GM_config div.config_var { padding: 7px 0; }",
                ].join('\n') + '\n',
            basicPrefix: "GM_config",
            stylish: ""
        };
    }

  if (args.length == 1 &&
    typeof args[0].id == "string" &&
    typeof args[0].appendChild != "function") var settings = args[0];
  else {
    // Provide backwards-compatibility with argument style intialization
    var settings = {};

    // loop through GM_config.init() arguments
    for (var i = 0, l = args.length, arg; i < l; ++i) {
      arg = args[i];

      // An element to use as the config window
      if (typeof arg.appendChild == "function") {
        settings.frame = arg;
        continue;
      }

            switch (typeof arg) {
                case 'object':
                    for (var j in arg) { // could be a callback functions or settings object
                        if (typeof arg[j] != "function") { // we are in the settings object
                            if (typeof arg[j] == 'string') {
                                settings.frameStyle = arg;
                            } else {
                                settings.fields = arg; // store settings object
                            }
                            break; // leave the loop
                        } // otherwise it must be a callback function
                        if (!settings.events) settings.events = {};
                        settings.events[j] = arg[j];
                    }
                    break;
                case 'function': // passing a bare function is set to open callback
                    settings.events = {open: arg};
                    break;
                case 'string': // could be custom CSS or the title string
                    // if (/[\w\.]+\s*\{\s*[\w-]+\s*:\s*\w+[\s|\S]*\}/.test(arg))
                    if (/[\w\.]+\s*\{\s*[\w-]+\s*:[\s|\S]*\}/.test(arg))
                        settings.css = arg;
                    else if (arg)
                        settings.title = arg;
                    break;
            }
        }
    }

  /* Initialize everything using the new settings object */
  // Set the id
  if (settings.id) config.id = settings.id;
  else if (typeof config.id == "undefined") config.id = 'GM_config';

  // Set the title
  if (settings.title) config.title = settings.title;

  // Set the custom css
  if (settings.css) config.css.stylish = settings.css;

    if (settings.skin) {
        var skin = config.css['skin_' + settings.skin];
        if (skin) {
            config.css.basic += skin;
        }
    }

    // Set the frame
    if (settings.frame) config.frame = settings.frame;
    if (settings.frameStyle) config.frameStyle = settings.frameStyle;

    config.isTabs = settings.isTabs;

  // Set the event callbacks
  if (settings.events) {
    var events = settings.events;
    for (var e in events)
      config["on" + e.charAt(0).toUpperCase() + e.slice(1)] = events[e];
  }

    // Create the fields
    if (settings.fields) {
        var stored = config.read(), // read the stored settings
                fields = settings.fields,
                customTypes = settings.types || {};

    for (var id in fields) {
      var field = fields[id];

            // for each field definition create a field object
            if (field)
                config.fields[id] = new GM_configField(field, stored[id], id,
                    customTypes[field.type]);
            else if (config.fields[id]) delete config.fields[id];
        }
    }

  // If the id has changed we must modify the default style
  if (config.id != config.css.basicPrefix) {
    config.css.basic = config.css.basic.replace(
      new RegExp('#' + config.css.basicPrefix, 'gm'), '#' + config.id);
    config.css.basicPrefix = config.id;
  }
}

GM_configStruct.prototype = {
  // Support old method of initalizing
  init: function() {
    GM_configInit(this, arguments);
    this.onInit();
  },

  // call GM_config.open() from your script to open the menu
  open: function () {
    // Die if the menu is already open on this page
    // You can have multiple instances but you can't open the same instance twice
    var match = document.getElementById(this.id);
    if (match && (match.tagName == "IFRAME" || match.childNodes.length > 0)) return;

    // Sometimes "this" gets overwritten so create an alias
    var config = this;

    // Function to build the mighty config window :)
    function buildConfigWin (body, head) {
      var create = config.create,
          fields = config.fields,
          configId = config.id,
          bodyWrapper = create('div', {id: configId + '_wrapper'});

      // Append the style which is our default style plus the user style
      head.appendChild(
        create('style', {
        type: 'text/css',
        textContent: config.css.basic + config.css.stylish
      }));

      // Add header and title
      bodyWrapper.appendChild(create('div', {
        id: configId + '_header',
        className: 'config_header block center'
      }, config.title));

            // Append elements
            var section = bodyWrapper,
                    secNum = 0; // Section count
            var lastParentNode = null;

      // loop through fields
      for (var id in fields) {
        var field = fields[id],
            settings = field.settings;

        if (settings.section) { // the start of a new section
          section = bodyWrapper.appendChild(create('div', {
              className: 'section_header_holder',
              id: configId + '_section_' + secNum
            }));

          if (Object.prototype.toString.call(settings.section) !== '[object Array]')
            settings.section = [settings.section];

          if (settings.section[0])
            section.appendChild(create('div', {
              className: 'section_header center',
              id: configId + '_section_header_' + secNum
            }, settings.section[0]));

          if (settings.section[1])
            section.appendChild(create('p', {
              className: 'section_desc center',
              id: configId + '_section_desc_' + secNum
            }, settings.section[1]));
          ++secNum;
        }

                if (settings.line == 'start' && lastParentNode) {  // 切换到下一行
                    lastParentNode = null;
                }

                // Create field elements and append to current section
                (lastParentNode || section).appendChild((field.wrapper = field.toNode(configId, lastParentNode)));

                if (settings.line == 'start') {
                    lastParentNode = field.wrapper;
                    lastParentNode.classList.add('inline')
                } else if (settings.line == 'end') {
                    lastParentNode = null;
                }
            }

      // Add save and close buttons
      bodyWrapper.appendChild(create('div',
        {id: configId + '_buttons_holder'},

                create('button', {
                    id: configId + '_saveBtn',
                    textContent: '确定',
                    title: '部分选项需要刷新页面才能生效',
                    className: 'saveclose_buttons',
                    onclick: function () {
                        config.save();
                        config.close();
                    }
                }),

                create('button', {
                    id: configId + '_closeBtn',
                    textContent: '取消',
                    title: '取消本次设置，所有选项还原',
                    className: 'saveclose_buttons',
                    onclick: function () {
                        config.close()
                    }
                }),

        create('div',
          {className: 'reset_holder block'},

                    // Reset link
                    create('a', {
                        id: configId + '_resetLink',
                        textContent: '恢复默认设置',
                        href: '#',
                        title: '恢复所有设置的内容为默认值',
                        className: 'reset',
                        onclick: function (e) {
                            e.preventDefault();
                            config.reset()
                        }
                    })
            )));

      body.appendChild(bodyWrapper); // Paint everything to window at once
      config.center(); // Show and center iframe
      window.addEventListener('resize', config.center, false); // Center frame on resize

            // Call the open() callback function
            config.onOpen(config.frame.contentDocument || config.frame.ownerDocument,
                                        config.frame.contentWindow || window,
                                        config.frame);

            if (config.isTabs) {
                config.toTabs();
            }

      // Close frame on window close
      window.addEventListener('beforeunload', function () {
          config.close();
      }, false);

      // Now that everything is loaded, make it visible
      config.frame.style.display = "block";
      config.isOpen = true;
    }

        // Change this in the onOpen callback using this.frame.setAttribute('style', '')
        var defaultStyle = 'bottom: auto; border: 1px solid #000; display: none; height: 75%;'
			+ ' left: 0; margin: 0; max-height: 95%; max-width: 95%; opacity: 0;'
			+ ' overflow: auto; padding: 0; position: fixed; right: auto; top: 0;'
			+ ' width: 75%; z-index: 999999999;';

        // Either use the element passed to init() or create an iframe
        if (this.frame) {
            this.frame.id = this.id; // Allows for prefixing styles with the config id
            this.frame.setAttribute('style', defaultStyle);
            buildConfigWin(this.frame, this.frame.ownerDocument.getElementsByTagName('head')[0]);
        } else {
            // Create frame
            document.body.appendChild((this.frame = this.create('iframe', {
                id: this.id,
                style: defaultStyle
            })));

            if (this.frameStyle) {
                Object.keys(this.frameStyle).forEach(function(key) {
                    config.frame.style[key] = config.frameStyle[key];
                })
            }

      // In WebKit src can't be set until it is added to the page
      this.frame.src = 'about:blank';
      // we wait for the iframe to load before we can modify it
      this.frame.addEventListener('load', function(e) {
          var frame = config.frame;
          var body = frame.contentDocument.getElementsByTagName('body')[0];
          body.id = config.id; // Allows for prefixing styles with the config id
          buildConfigWin(body, frame.contentDocument.getElementsByTagName('head')[0]);
      }, false);
    }
  },

  save: function () {
    var forgotten = this.write();
    this.onSave(forgotten); // Call the save() callback function
  },

    close: function() {
        if (!this.frame) return;
        // If frame is an iframe then remove it
        if (this.frame.contentDocument) {
            this.remove(this.frame);
            this.frame = null;
        } else { // else wipe its content
            this.frame.innerHTML = "";
            this.frame.style.display = "none";
        }

    // Null out all the fields so we don't leak memory
    var fields = this.fields;
    for (var id in fields) {
      var field = fields[id];
      field.wrapper = null;
      field.node = null;
    }

    this.onClose(); //  Call the close() callback function
    this.isOpen = false;
  },

  set: function (name, val) {
    this.fields[name].value = val;

    if (this.fields[name].node) {
      this.fields[name].reload();
    }
  },

  get: function (name, getLive) {
    var field = this.fields[name],
        fieldVal = null;

    if (getLive && field.node) {
      fieldVal = field.toValue();
    }

    return fieldVal != null ? fieldVal : field.value;
  },

  write: function (store, obj) {
    if (!obj) {
      var values = {},
          forgotten = {},
          fields = this.fields;

      for (var id in fields) {
        var field = fields[id];
        var value = field.toValue();

        if (field.save) {
          if (value != null) {
            values[id] = value;
            field.value = value;
          } else
            values[id] = field.value;
        } else
          forgotten[id] = value;
      }
    }
    try {
      this.setValue(store || this.id, this.stringify(obj || values));
    } catch(e) {
      this.log("GM_config failed to save settings!");
    }

    return forgotten;
  },

  read: function (store) {
    try {
      var rval = this.parser(this.getValue(store || this.id, '{}'));
    } catch(e) {
      this.log("GM_config failed to read saved settings!");
      var rval = {};
    }
    return rval;
  },

  reset: function () {
    var fields = this.fields;

    // Reset all the fields
    for (var id in fields) fields[id].reset();

    this.onReset(); // Call the reset() callback function
  },

    create: function () {
        switch(arguments.length) {
            case 1:
                var A = document.createTextNode(arguments[0]);
                break;
            default:
                var A = document.createElement(arguments[0]),
                        B = arguments[1];
                for (var b in B) {
                    if (b.indexOf("on") == 0)
                        A.addEventListener(b.substring(2), B[b], false);
                    else if (",style,accesskey,id,name,src,href,which,for".indexOf("," +
                                     b.toLowerCase()) != -1)
                        A.setAttribute(b, B[b]);
                    else if (typeof B[b] != 'undefined')
                        A[b] = B[b];
                }
                if (typeof arguments[2] == "string")
                    A.innerHTML = arguments[2];
                else
                    for (var i = 2, len = arguments.length; i < len; ++i)
                        A.appendChild(arguments[i]);
        }
        return A;
    },

  center: function () {
    var node = this.frame;
    if (!node) return;
    var style = node.style,
        beforeOpacity = style.opacity;
    if (style.display == 'none') style.opacity = '0';
    style.display = '';
    style.top = Math.floor((window.innerHeight / 2) - (node.offsetHeight / 2)) + 'px';
    style.left = Math.floor((window.innerWidth / 2) - (node.offsetWidth / 2)) + 'px';
    style.opacity = '1';
  },

    remove: function (el) {
        if (el && el.parentNode) el.parentNode.removeChild(el);
    },

    toTabs: function() {  // 转为 tab 的形式
        var body = this.frame.tagName == 'IFRAME' ? this.frame.contentWindow.document : this.frame,
            configId = this.id;
        var $ = function(id) {
            return body.getElementById(configId + '_' + id);
        };

        var headers = body.querySelectorAll('.section_header');
        if (!headers.length) return;

        var anch = this.create('div', {
            // id: configId + '_tab_holder',
            className: 'nav-tabs',
        });

        for (var i = 0, header; i < headers.length; i++) {
            header = headers[i];
            if (i == 0) {
                header.classList.add('active');
            }
            anch.appendChild(header);
        }

        anch.addEventListener('click', this.toggleTab.bind(this), false);

        $('section_0').parentNode.insertBefore(anch, $('section_0'));

        var curTab = localStorage.getItem('picviewerCE.config.curTab') || 0;
        this.toggleTab(parseInt(curTab, 10));
    },
    toggleTab: function(e) {
        var body = this.frame.tagName == 'IFRAME' ? this.frame.contentWindow.document : this.frame,
            configId = this.id;

        var curTab = typeof e == 'number' ? e : /\_(\d+)/.exec(e.target.id)[1];

        [].forEach.call(body.querySelectorAll('.section_header'), function(header, i) {
            if (i == curTab) {
                header.classList.add('active');
            } else {
                header.classList.remove('active');
            }
        });

        [].forEach.call(body.querySelectorAll('.section_header_holder'), function(holder, i) {
            holder.style.display = (i == curTab) ? 'block' : 'none';
        });

        localStorage.setItem('picviewerCE.config.curTab', curTab)
    }
};

// Define a bunch of API stuff
(function() {
  var isGM = typeof GM_getValue != 'undefined' &&
             typeof GM_getValue('a', 'b') != 'undefined',
      setValue, getValue, stringify, parser;

  // Define value storing and reading API
  if (!isGM) {
    setValue = function (name, value) {
      return localStorage.setItem(name, value);
    };
    getValue = function(name, def){
      var s = localStorage.getItem(name);
      return s == null ? def : s
    };

    // We only support JSON parser outside GM
    stringify = JSON.stringify;
    parser = JSON.parse;
  } else {
    setValue = GM_setValue;
    getValue = GM_getValue;
    stringify = typeof JSON == "undefined" ?
      function(obj) {
        return obj.toSource();
    } : JSON.stringify;
    parser = typeof JSON == "undefined" ?
      function(jsonData) {
        return (new Function('return ' + jsonData + ';'))();
    } : JSON.parse;
  }

  GM_configStruct.prototype.isGM = isGM;
  GM_configStruct.prototype.setValue = setValue;
  GM_configStruct.prototype.getValue = getValue;
  GM_configStruct.prototype.stringify = stringify;
  GM_configStruct.prototype.parser = parser;
  GM_configStruct.prototype.log =  window.console ?
    console.log : (isGM && typeof GM_log != 'undefined' ?
      GM_log : (window.opera ?
        opera.postError : function(){ /* no logging */ }
  ));
})();

function GM_configDefaultValue(type, options) {
  var value;

    if (type && type.indexOf('unsigned ') == 0)
        type = type.substring(9);

  switch (type) {
    case 'radio': case 'select':
      value = options[0];
      break;
    case 'checkbox':
      value = false;
      break;
    case 'int': case 'integer':
    case 'float': case 'number':
      value = 0;
      break;
    default:
      value = '';
  }

  return value;
}

function GM_configField(settings, stored, id, customType) {
    // Store the field's settings
    this.settings = settings;
    this.id = id;
    this.node = null;
    this.wrapper = null;
    this.save = typeof settings.save == "undefined" ? true : settings.save;

    // Buttons are static and don't have a stored value
    if (settings.type == "button") this.save = false;
    if (settings.type == "span") this.save = false;

  // if a default value wasn't passed through init() then
  //   if the type is custom use its default value
  //   else use default value for type
  // else use the default value passed through init()
  this['default'] = typeof settings['default'] == "undefined" ?
    customType ?
      customType['default']
      : GM_configDefaultValue(settings.type, settings.options)
    : settings['default'];

  // Store the field's value
  this.value = typeof stored == "undefined" ? this['default'] : stored;

  // Setup methods for a custom type
  if (customType) {
    this.toNode = customType.toNode;
    this.toValue = customType.toValue;
    this.reset = customType.reset;
  }
}

GM_configField.prototype = {
  create: GM_configStruct.prototype.create,

    toNode: function(configId, lastParentNode) {
        var field = this.settings,
                value = this.value,
                options = field.options,
                type = field.type,
                id = this.id,
                labelPos = field.labelPos,
                create = this.create;

        function addLabel(pos, labelEl, parentNode, beforeEl) {
            if (!beforeEl) {
                beforeEl = lastParentNode ? parentNode.lastChild : parentNode.firstChild;  // oneLine 的修正
            }

            switch (pos) {
                case 'right': case 'below':
                    if (pos == 'below')
                        parentNode.appendChild(create('br', {}));
                    parentNode.appendChild(labelEl);
                    break;
                default:
                    if (pos == 'above')
                        parentNode.insertBefore(create('br', {}), beforeEl);
                    parentNode.insertBefore(labelEl, beforeEl);
            }
        }

    var retNode = create('div', { className: 'config_var',
          id: configId + '_' + id + '_var',
          title: field.title || '' }),
        firstProp;

    // Retrieve the first prop
    for (var i in field) { firstProp = i; break; }

    var label = field.label && type != "button" ?
      create('label', {
        id: configId + '_' + id + '_field_label',
        for: configId + '_field_' + id,
        className: 'field_label'
      }, field.label) : null;

        switch (type) {
            case 'span':
                label = null;

                this.node = create('span', {
                    innerHTML: field.label,
                    className: 'field_label',
                    title: field.title,
                    style: field.style
                });
                retNode = this.node;
                break;
            case 'textarea':
                retNode.appendChild((this.node = create('textarea', {
                    innerHTML: value,
                    id: configId + '_field_' + id,
                    className: 'block' + (field.className ? (" " + field.className) : ''),
                    cols: (field.cols ? field.cols : 20),
                    rows: (field.rows ? field.rows : 2),
                    placeholder: field.placeholder
                })));
                break;
            case 'radio':
                var wrap = create('div', {
                    id: configId + '_field_' + id,
                    className: field.className
                });
                this.node = wrap;

        for (var i = 0, len = options.length; i < len; ++i) {
          var radLabel = create('label', {
            className: 'radio_label'
          }, options[i]);

          var rad = wrap.appendChild(create('input', {
            value: options[i],
            type: 'radio',
            name: id,
            checked: options[i] == value
          }));

          var radLabelPos = labelPos &&
            (labelPos == 'left' || labelPos == 'right') ?
            labelPos : firstProp == 'options' ? 'left' : 'right';

          addLabel(radLabelPos, radLabel, wrap, rad);
        }

        retNode.appendChild(wrap);
        break;
      case 'select':
        var wrap = create('select', {
          id: configId + '_field_' + id
        });
        this.node = wrap;

        for (var i = 0, len = options.length; i < len; ++i) {
          var option = options[i];
          wrap.appendChild(create('option', {
            value: option,
            selected: option == value
          }, option));
        }

        retNode.appendChild(wrap);
        break;
      default: // fields using input elements
        var props = {
          id: configId + '_field_' + id,
          type: type,
          value: type == 'button' ? field.label : value
        };

        switch (type) {
          case 'checkbox':
            props.checked = value;
            break;
          case 'button':
            props.size = field.size ? field.size : 25;
            if (field.script) field.click = field.script;
            if (field.click) props.onclick = field.click;
            break;
          case 'hidden':
            break;
          default:
            // type = text, int, or float
            props.type = 'text';
            props.size = field.size ? field.size : 25;
        }

        retNode.appendChild((this.node = create('input', props)));
    }

    if (label) {
      // If the label is passed first, insert it before the field
      // else insert it after
      if (!labelPos)
        labelPos = firstProp == "label" || type == "radio" ?
          "left" : "right";

      addLabel(labelPos, label, retNode);
    }

    return retNode;
  },

  toValue: function() {
    var node = this.node,
        field = this.settings,
        type = field.type,
        unsigned = false,
        rval = null;

    if (!node) return rval;

    if (type.indexOf('unsigned ') == 0) {
      type = type.substring(9);
      unsigned = true;
    }

    switch (type) {
      case 'checkbox':
        rval = node.checked;
        break;
      case 'select':
        rval = node[node.selectedIndex].value;
        break;
      case 'radio':
        var radios = node.getElementsByTagName('input');
        for (var i = 0, len = radios.length; i < len; ++i)
          if (radios[i].checked)
            rval = radios[i].value;
        break;
      case 'button':
        break;
      case 'int': case 'integer':
      case 'float': case 'number':
        var num = Number(node.value);
        var warn = '输入字符 "' + field.label + '" 要求必须为' +
          (unsigned ? ' 正 ' : 'n ') + '整数值';

        if (isNaN(num) || (type.substr(0, 3) == 'int' &&
            Math.ceil(num) != Math.floor(num)) ||
            (unsigned && num < 0)) {
          alert(warn + '.');
          return null;
        }

        if (!this._checkNumberRange(num, warn))
          return null;
        rval = num;
        break;
      default:
        rval = node.value;
        break;
    }

    return rval; // value read successfully
  },

  reset: function() {
    var node = this.node,
        field = this.settings,
        type = field.type;

    if (!node) return;

        switch (type) {
            case 'checkbox':
                node.checked = this['default'];
                break;
            case 'select':
                for (var i = 0, len = node.options.length; i < len; ++i)
                if (node.options[i].value == this['default'])
                        node.selectedIndex = i;
                break;
            case 'radio':
                var radios = node.getElementsByTagName('input');
                for (var i = 0, len = radios.length; i < len; ++i)
                    if (radios[i].value == this['default'])
                        radios[i].checked = true;
                break;
            case 'button' :
                break;
            default:
                node.value = this['default'];
                break;
            }
    },

  remove: function(el) {
    GM_configStruct.prototype.remove(el || this.wrapper);
    this.wrapper = null;
    this.node = null;
  },

  reload: function() {
    var wrapper = this.wrapper;
    if (wrapper) {
      var fieldParent = wrapper.parentNode;
      fieldParent.insertBefore((this.wrapper = this.toNode()), wrapper);
      this.remove(wrapper);
    }
  },

  _checkNumberRange: function(num, warn) {
    var field = this.settings;
    if (typeof field.min == "number" && num < field.min) {
      alert(warn + ' greater than or equal to ' + field.min + '.');
      return null;
    }

    if (typeof field.max == "number" && num > field.max) {
      alert(warn + ' less than or equal to ' + field.max + '.');
      return null;
    }
    return true;
  }
};

// Create default instance of GM_config
var GM_config = new GM_configStruct();